#
# Copyright (c) 2011, EPFL (Ecole Politechnique Federale de Lausanne)
# All rights reserved.
#
# Created by Marco Canini, Daniele Venzano, Dejan Kostic, Jennifer Rexford
# Contributed to this file: Peter Peresini
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   -  Redistributions of source code must retain the above copyright notice,
#      this list of conditions and the following disclaimer.
#   -  Redistributions in binary form must reproduce the above copyright notice,
#      this list of conditions and the following disclaimer in the documentation
#      and/or other materials provided with the distribution.
#   -  Neither the names of the contributors, nor their associated universities or
#      organizations may be used to endorse or promote products derived from this
#      software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
# SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

from host import Host
from nox.lib.packet.ethernet import ethernet
from nox.lib.packet.mac_address import MacAddress

"""
	# 	In this class packets are send to the specified location
"""
class Arrival(Host):
	def __init__(self, name, mymac=(0,0,0,0,0,0), dstmac=(0,0,0,0,0,0), pkts=1, sequential=False):
		Host.__init__(self, name, mymac, "10.0.0.1")
		self.dstmac = MacAddress(dstmac)
		self.pkts = pkts
		self.received_pkt_count = 0
		self.sequential_packet_id = 1
		self.sequential = sequential

	def start(self, model_checker):
		Host.start(self, model_checker)
		self.enableAction("send_packet", (1))

	def send_packet(self, packet_id):
		packet = self.build_ethernet_packet("pkt%d" % packet_id, self.dstmac, None, 0)
		self.sendPacket(packet, 0)
		if not self.sequential:
			if (packet_id < self.pkts):
				self.enableAction("send_packet", (packet_id + 1))
		return True

	def process_packet(self):
		self.received_pkt_count = self.received_pkt_count + 1
		_pkt = self.getWaitingPacket(0)
		if self.sequential and (self.sequential_packet_id < self.pkts):
			self.sequential_packet_id += 1
			self.enableAction("send_packet", (self.sequential_packet_id))
		return not self.checkWaitingPacket(0)

	def __getstate__(self):
		filtered_dict = Host.__getstate__(self)
		filtered_dict["received_pkt_count"] = self.received_pkt_count
		return filtered_dict

